http://www.legislation.gov.uk/eur/2020/691/article/2Commission Delegated Regulation (EU) 2020/691 of 30 January 2020 supplementing Regulation (EU) 2016/429 of the European Parliament and of Council as regards rules for aquaculture establishments and transporters of aquatic animals (Text with EEA relevance)Commission Delegated Regulation (EU) 2020/691Commission Delegated Regulation (EU) 2020/691 of 30 January 2020 supplementing Regulation (EU) 2016/429 of the European Parliament and of Council as regards rules for aquaculture establishments and transporters of aquatic animals (Text with EEA relevance)2020-12-12King's Printer of Acts of Parliamenthttps://webarchive.nationalarchives.gov.uk/eu-exit/https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32020R0691texttext/xmlen2020-01-30 PART I <Strong>SUBJECT MATTER, SCOPE AND DEFINITIONS</Strong> Definitions Article 2 For the purposes of this Regulation, the definitions set out in Article 1 of Implementing Regulation (EU) 2018/1882 shall apply. The following definitions shall also apply: ‘extensive pond’ means a traditional pond or lagoon which is natural or artificial and where the food source for the animals kept in these ponds or lagoons is natural other than in exceptional circumstances, and where no measures are taken to increase the production beyond the natural capacity of the environment; ‘purification centre’ means an establishment with tanks fed by clean seawater in which molluscs are placed for the time necessary to reduce contamination to make them fit for human consumption; ‘dispatch centre’ means an on-shore or off-shore establishment for the reception, conditioning, washing, cleaning, grading, wrapping and packaging of molluscs intended for human consumption; ‘relaying area’ means any freshwater, sea, estuarine or lagoon area with boundaries clearly marked and indicated by buoys, posts or any other fixed means, and used exclusively for the natural purification of molluscs; ‘in isolation’ means keeping aquaculture animals in an aquaculture establishment where they do not come into contact with any other species of aquatic animals either directly through co-habitation or indirectly through the water supply; ‘closed facility’ means an aquaculture establishment, the waste water from which, is subjected to treatment which is capable of inactivating agents of listed diseases or emerging diseases, before it is discharged into open waters; ‘open facility’ means an aquaculture establishment, the waste water from which, is discharged directly into open waters without being treated to inactivate agents of listed diseases or emerging diseases; ‘epidemiological area’ means a defined geographical area where the aquatic animals have the same health status and are exposed to the same risk of contracting a listed disease or an emerging disease; ‘biosecurity plan’ means a documented plan which identifies the routes by which a disease agent can enter an aquaculture establishment, spread within it and transfer from it; it takes account of the specificities of the establishment and identifies measures which will mitigate the biosecurity risks which have been identified; ‘common biosecurity measures’ means the measures included in a biosecurity plan which has been devised for, and implemented by, each aquaculture establishment in a group of aquaculture establishments which has been approved by the competent authority in accordance with Article 177 of Regulation (EU) 2016/429; ‘unique registration number’ means a number assigned to a registered aquaculture establishment or group of aquaculture establishments as referred to in Article 173 of Regulation (EU) 2016/429; ‘unique approval number’ means a number assigned by the competent authority to an aquaculture establishment or group of aquaculture establishments approved by it in accordance with Article 173 of Regulation (EU) 2016/429; ‘IMO ship identification number’ means a unique number assigned to sea-going vessels by the International Maritime Organisation (IMO); ‘hygiene barrier’ means footbaths, hand washes, changes of clothing or other biosecurity measures, the effects of which are to create barriers to the spread of disease into, within or from an aquaculture establishment; ‘production units’ means troughs, ponds, raceways, tanks, cages, pens, or similar structures which contain groups of aquaculture animals in an aquaculture establishment; ‘increased mortality’ means unexplained mortalities above the level considered normal for the aquaculture establishment or group of aquaculture establishments in question, under prevailing conditions; ‘surveillance programme’ means a voluntary programme of testing and control measures undertaken in relation to a category C disease at an aquaculture establishment which is not participating in an eradication programme to achieve disease-free status, but where testing indicates that the aquaculture establishment is not infected with that category C disease.